Season Finale (8 p.m., ABC)After eight years of making medical diagnoses, nurturing his bromance with Turk and trying to steer clear of the janitor’s digs, J.D. (Zach Braff) is hanging up his scrubs. He has just one wish for his last day in the halls of Sacred Heart Hospital: to get a goodbye hug from his mentor, Dr. Cox. Will this daydream be the one that actually becomes a reality in the series’ season ender?